Department of Biology at the University of Rochester
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Centris (Paracentris) caesalpiniae Cockerell male. Photo taken by Lucia de las Salas Arcos

Female Calliopsis (Hypomacrotera) subalpinus Cockerell collecting pollen from Sphaeralcea laxa. Photo taken by Rich Hatfield

One of our pollination sites taken early, April Spring 2005. Most of the flowers in the picture are Lesquerella gordoni, Eschscholziacalifornica and Phacelia spp. Photo by T.H. Roulston

Night blooming cereus (Peniocereus greggii (Engel.) Britt. and Rose. Photo by R.L. Minckley


Below is a list of bee species and their floral hosts collected in the San Bernardino Valley from the year 2000 to 2006. Many specimens of bees and plants are not identified, or have not had their identities adequately confirmed. Periodic updates of the data will be made to reflect these changes.

Besides ongoing identifications, another word of caution is that visits to floral hosts are scored regardless of the number of visits to the host, and regardless of sex or if the bee visit was to collect pollen, nectar, or both. Therefore, any conclusions about the significance to the pollination relationship from these tables would be tenuous, and possibly incorrect.

All bee species collected on flowers
All Plant Species from Which Bees Were Collected

Agapostemon angelicus Ph
Agapostemon melliventris
Agapostemon nasutus
Agapostemon obliquus
Agapostemon tyleri Ph
Ancylandrena rozeni
Ancyloscelis melanostomus
Andrena auricoma
Andrena capricornis
Andrena cerasifolii
Andrena fracta
Andrena jessicae
Andrena mesillae
Andrena monilicornis
Andrena olivacea
Andrena piperi
Andrena prima
Andrena primulifrons
Andrena prunorum
Andrena semipunctata
Andrena sphaeralceae
Anthidiellum ehrhorni
Anthidiellum notatum
Anthidium atripes
Anthidium cochimi
Anthidium cockerelli
Anthidium emarginatum
Anthidium jocosum
Anthidium maculifrons
Anthidium maculosum
Anthidium mormonum
Anthidium palmarum
Anthidium paroselae
Anthidium placitum
Anthidium porterae
Anthidium sonorense
Anthidium tenuiflorae
Anthidium utahense
Anthocopa arizonensis
Anthophora aff. estebana
Anthophora affabilis
Anthophora bomboides
Anthophora californica Ph
Anthophora centriformis
Anthophora curta
Anthophora exigua
Anthophora fulvicauda
Anthophora maculifrons
Anthophora pachyodonta
Anthophora petrophila
Anthophora phenax
Anthophora squammulosa
Anthophora urbana
Anthophora vallorum
Anthophora vannigera
Anthophorula albata
Anthophorula asteris
Anthophorula centralis
Anthophorula compactula
Anthophorula completa
Anthophorula consobrina
Anthophorula crenulata
Anthophorula euphorbiae
Anthophorula exilis
Anthophorula gutierreziae
Anthophorula ignota
Anthophorula palmarum
Anthophorula parva
Anthophorula pygmaea
Anthophorula rozeni
Anthophorula rufiventris
Anthophorula scapalis
Anthophorula sonorensis
Anthophorula torticornis
Anthophorula tricinctula
Anthophorula varleyi
Apis mellifera Ph
Ashmeadiella bigeloviae Ph
Ashmeadiella breviceps
Ashmeadiella bucconis
Ashmeadiella cactorum
Ashmeadiella cazieri
Ashmeadiella clypeodentata
Ashmeadiella foveata
Ashmeadiella gillettei
Ashmeadiella holtii
Ashmeadiella hurdiana
Ashmeadiella leucozona
Ashmeadiella maxima
Ashmeadiella meliloti
Ashmeadiella occipitalis
Ashmeadiella opuntiae
Ashmeadiella prosopidis
Ashmeadiella rhodognatha
Ashmeadiella rubrella
Ashmeadiella sonora
Ashmeadiella vandykiella
Atoposmia anthodyta
Atoposmia arizonensis
Atoposmia beameri
Atoposmia copelandica arefacta
Atoposmia hypostomalis
Atoposmia namatophila
Augochlora pura
Augochlorella neglectula neglectula
Augochlorella pomoniella
Augochloropsis metallica metallica
Bombus sonorus
Brachynomada margaretae
Calliopsis anomoptera
Calliopsis australior
Calliopsis callops
Calliopsis callosa
Calliopsis chlorops
Calliopsis coloratipes
Calliopsis crypta
Calliopsis empelia
Calliopsis gilva
Calliopsis helianthi Ph
Calliopsis limbus
Calliopsis macswaini
Calliopsis nigromaculata
Calliopsis obscurella
Calliopsis pectidis
Calliopsis persimilis
Calliopsis puellae Ph
Calliopsis rogeri
Calliopsis rozeni
Calliopsis sonora
Calliopsis sonorana
Calliopsis squamifera
Calliopsis subalpina subalpina
Calliopsis verbenae
Caupolicana yarrowi
Centris angustifrons
Centris atripes
Centris caesalpiniae
Centris cockerelli
Centris hoffmanseggiae
Centris rhodopus
Centris ruthannae
Ceratina acantha
Ceratina apacheorum Ph
Ceratina arizonensis
Ceratina melanoptera
Ceratina nanula
Ceratina neomexicana
Coelioxys apacheorum
Coelioxys edita
Coelioxys hirsutissima
Coelioxys hunteri
Coelioxys novomexicana
Coelioxys octodentata
Coelioxys texana
Colletes algarobiae
Colletes bryanti
Colletes clypeonitens
Colletes eulophi
Colletes intermixtus
Colletes kincaidii
Colletes louisae
Colletes lutzi
Colletes perileucus
Colletes prosopidis
Colletes salicicola
Colletes scopiventer
Colletes simulans simulans
Colletes sphaeralceae
Colletes wootoni
Conanthalictus new sp. 1
Diadasia afflictula
Diadasia australis
Diadasia diminuta Ph
Diadasia lutzi
Diadasia martialis
Diadasia megamorpha
Diadasia ochracea Ph
Diadasia opuntiae
Diadasia rinconis
Diadasia sphaeralcearum sphaeralcearum
Diadasia tropicalis
Diadasia vallicola
Dianthidium curvatum sayi
Dianthidium discors
Dianthidium heterulkei
Dianthidium implicatum
Dianthidium parkeri
Dianthidium parvum
Dianthidium platyurum
Dianthidium pudicum
Dianthidium pudicum consimile
Dianthidium ulkei
Dieunomia nevadensis
Dioxys producta subrubra
Dufourea malacothricis
Dufourea mulleri
Dufourea pulchricornis
Epeolus compactus
Epeolus mesillae
Ericrocis lata
Ericrocis pintada
Eucera actuosa
Eucera albescens
Eucera aragalli
Eucera edwardsii
Eucera mohavensis
Eucera phaceliae
Eucera quadricincta
Eucera tricinctella
Exomalopsis dimidiata
Exomalopsis solani
Exomalopsis solidaginis
Halictus ligatus Ph
Halictus tripartitus Ph
Heriades crucifer
Heriades micheneri
Heriades micropthalma
Heriades texanus
Heriades timberlakei
Hesperapis cockerelli
Hesperapis fuchsi
Hesperapis larreae
Holcopasites apacheorum
Holcopasites illinoiensis minimus
Holcopasites insoletus
Holcopasites stevensi
Holcopasites tegularis
Hoplitis biscutellae
Hoplitis grinnelli grinnelli
Hoplitis producta interior
Hoplitis remotula
Hylaeus asininus
Hylaeus episcopalis coquilletti
Hylaeus insolitus
Hylaeus mesillae Ph
Lasioglossum aff. perdifficile
Lasioglossum aff. perparvum
Lasioglossum aff. veganum
Lasioglossum cf. albuquerquense
Lasioglossum cf. brunneiventre
Lasioglossum cf. comulum
Lasioglossum cf. eophilum
Lasioglossum cf. impavidum
Lasioglossum cf. lionotum
Lasioglossum cf. nevadense
Lasioglossum cf. obnubilum
Lasioglossum cf. persimilis
Lasioglossum cf. subobscurum
Lasioglossum acarophilum
Lasioglossum aff. macroprosopum
Lasioglossum amicum
Lasioglossum angustius
Lasioglossum arcanum
Lasioglossum clematisellum
Lasioglossum comulum
Lasioglossum desertum
Lasioglossum hudsoniellum
Lasioglossum jubatum
Lasioglossum microlepoides
Lasioglossum morrilli
Lasioglossum obnubilum
Lasioglossum pectoraloides
Lasioglossum perparvum
Lasioglossum pruinosum
Lasioglossum robertsoni
Lasioglossum semibrunneum
Lasioglossum semicaeruleum
Lasioglossum sisymbrii
Lasioglossum unicum
Leiopodus singularis
Lithurgus apicalis
Lithurgus echinocacti
Lithurgus planifrons
Macrotera latior
Macrotera mellea
Macrotera parkeri
Macrotera portalis
Macrotera rubida
Macrotera solitaria
Macrotera texana
Martinapis luteicornis
Megachile adelphodonta
Megachile alata
Megachile astragali
Megachile bradleyi
Megachile brevis
Megachile chilopsidis
Megachile coquilletti
Megachile discorhina
Megachile exilis
Megachile frugalis
Megachile fucata
Megachile gentilis
Megachile inimica sayi
Megachile integra
Megachile laurita
Megachile legalis
Megachile lippiae
Megachile lobatifrons
Megachile manni
Megachile mendica
Megachile newberryae
Megachile odontostoma
Megachile parallela
Megachile petulans
Megachile policaris
Megachile prosopidis
Megachile pugnata
Megachile reflexa
Megachile sidalceae
Megachile spinotulata
Megachile texana
Megachile xerophila
Melecta bohartorum
Melissodes agilis
Melissodes communis
Melissodes comptoides
Melissodes gilensis
Melissodes limbus
Melissodes lutulenta
Melissodes opuntiella
Melissodes paroselae Ph
Melissodes subagilis
Melissodes thelypodii thelypodii
Melissodes tristis
Melissodes verbesinarum
Neolarra batrae
Neolarra californica
Neolarra cockerelli
Neolarra pruinosa
Neolarra rozeni
Neolarra verbesinae
Neolarra vigilans
Neopasites cressoni
Nomada americana
Nomada gutierreziae
Nomada vegana
Nomia foxii
Nomia mesillensis
Nomia tetrazonata tetrazonata
Oreopasites arizonica
Oreopasites favreauae
Oreopasites linsleyi
Osmia cerasi
Osmia clarescens
Osmia foxi
Osmia lignaria propinqua
Osmia liogastra
Osmia marginata
Osmia palmula
Osmia prunorum
Osmia subfasciata
Osmia texana
Osmia titusi
Osmia unca
Paranomada velutina
Peponapis pruinosa
Perdita albipennis
Perdita albovittata
Perdita amoena
Perdita ashmeadi vierecki
Perdita asteris
Perdita biguttata
Perdita bradleyana
Perdita callicerata Ph
Perdita chamaesarachae
Perdita cladothricis
Perdita coreopsidis collaris
Perdita dasylirii
Perdita difficilis
Perdita diversa
Perdita exclamans Ph
Perdita florissantella
Perdita hurdi Ph
Perdita ignota
Perdita larreae Ph
Perdita lenis
Perdita luciae
Perdita malacothricis
Perdita melanochlora
Perdita mimosae
Perdita minima
Perdita munita
Perdita pectidis
Perdita punctifera
Perdita punctosignata Ph
Perdita rhodogastra
Perdita semicaerulea
Perdita semicrocea
Perdita sexmaculata
Perdita sphaeralceae
Perdita stathamae
Perdita triangulifera
Perdita verbesinae
Protandrena bancrofti
Protandrena mexicanorum
Protandrena townsendi
Protoxaea gloriosa
Pseudopanurgus arizonicus
Pseudopanurgus dicksoni
Pseudopanurgus fraterculus fraterculus
Pseudopanurgus illustris
Pseudopanurgus nanulus
Pseudopanurgus pectidellus
Pseudopanurgus townsendi
Ptilothrix sumichrasti
Sphecodes aff. fortior
Sphecodes aff. mandibularis
Sphecodes aff. perlustrans
Sphecodes aff. sophiae
Sphecodes asclepiadis
Sphecodosoma dicksoni
Sphecodosoma pratti
Stelis elongativentris Ph
Stelis perpulchra
Svastra helianthelli
Svastra machaerantherae
Svastra sabinensis
Svastra sila
Syntrichalonia exquisita
Tetraloniella eriocarpi
Tetraloniella imitatrix
Tetraloniella sphaeralceae
Tetraloniella vandykei
Townsendiella pulchra
Trachusa larreae
Triepeolus circumculus
Triepeolus concavus
Triepeolus grandis
Triepeolus helianthi
Triepeolus kathrynae
Triepeolus loomisorum
Triepeolus lunatus
Triepeolus norae
Triepeolus penicilliferus
Triepeolus remigatus
Triepeolus townsendi
Triepeolus verbesinae
Triopasites penniger
Xenoglossa angustior
Xenoglossa strenua
Xylocopa californica arizonensis
Xylocopa varipuncta
Zacosmia maculata
Zikanapis elegans
Acacia neovernicosa
Allionia incarnata Ph
Anemopsis californica s. subglabra
Anemopsis californica subglabra
Antennaria sp?
Apiaceae sp?
Argemone pleiacantha Ph
Argemone pleicantha
Asclepias sp?
Astragalus allochrous
Astragalus sp?
Astragalus thurberi
Atriplex canescens Ph
Baccharis sarothroides
Bahia absinthifolia Ph
Baileya multiradiata Ph
Baileya pleniradiata Ph
Baileya sp?
Boerhaavia sp?
Brassica sp?
Calycoseris wrightii Ph
Camisonia chamaenerioides
Ceanothus buxifolius
Chaenactis stevoides Ph
Chaetopappa ericoides
Chamaesaracha coronopus Ph
Chamaesaracha sordida Ph
Chamaesaracha sp?
Chamaesaracha spp.
Chamaesyce sp?
Chenopodium neomexicana
Chilopsis linearis Ph
Compaester sp?
Convolvulus arvensis Ph
Coryphanta robbinsorum
Cryptantha angustifolia Ph
Cryptantha sp?
Cryptantha sp?
Cryptantha sp?
Cryptantha sp?
Cryptantha sp?
Cucurbita foetidissima Ph
Cucurbita pepo
Cylindropuntia spinosior Ph
Dalea formosa Ph
Dasyliron wheeleri Ph
Descurainia pinnata
Descurainia sophia Ph
Descurainia sp?
Descurainia sp?
Dichelostemma pulchellum Ph
Dyssodia acerosa
Dyssodia sp?
Eriastrum diffusum Ph
Erigeron divergens
Erigeron sp?
Eriogonum albertianum Ph
Eschscholzia californica Ph
Euphorbia albomarginata
Euphorbia sp?
Euphorbia sp?
Fouquieria splendens
Fraxinus sp?
Gaillardia pulchella
Gaura parviflora
Gilia sinuata
Gilia sp?
Glandularia gooddingii
Grindelia sp?
Gutierrezia microcephala
Helenium thurberi
Helenium thurberi Ph
Helianthus annuus Ph
Hymenoxys odorata Ph
Hymenoxys sp?
Ipomoea purpurea
Ipomoea sp?
Ipomopsis longiflora Ph
Kallstroemia californica Ph
Kallstroemia grandiflora
Kallstroemia sp?
Krameria erecta
Laennecia coulteri
Lappula redowskii
Larrea tridentata Ph
Lepidium sp?
Lepidium thurberi Ph
Leucophyllum frutescens
Linum lewisii
Lupinus concinnus Ph
Lycium andersonii wrightii
Lycium sp?
Lythrum californicum
Malacothrix fendleri Ph
Malacothrix glabrata
Malacothrix sp?
Malvella sp?
Marrubium vulgare
Melilotus alba
Melilotus sp?
Mentzelia albicaulis
Mentzelia pumila Ph
Mimulus guttatus Ph
Nama hispida
no host data
Opuntia engelmannii Ph
Opuntia engelmannii x phaeacantha
Opuntia leptocaulis?
Opuntia magenta
Opuntia phaeacantha Ph
Opuntia santarita Ph
Opuntia sp?
Opuntia violacea
pan trap Ph
Parkinsonia aculeata Ph
Penstemon parryi
Perolvskia sp?
Phacelia arizonica Ph
Phacelia coerulea
Phacelia crenulata Ph
Phacelia crenulata
Phacelia distans
Phacelia sp?
Physalis acutifolia Ph
Physalis sp?
Physaria fendleri
Physaria gordoni Ph
Polygala sp?
Porophyllum gracile Ph
Portulaca sp?
Proboscidea althaeifolia Ph
Proboscidea parviflora
Prosopis velutina Ph
Prunus sp?
Rorippa nasturtium-aquaticum
Salix gooddingii
Salsola iberica Ph
Salsola tragus
Salvia sp?
Senecio flaccidus
Senna bauhinioides
Sida sp?
Sidalcea neomexicana Ph
Sisymbrium irio
Solanum elaeagnifolium
Sphaeralcea angustifolia
Sphaeralcea laxa
Sphaeralcea sp?
Sphaeralcea sp?
Stephanomeria pauciflora
Stephanomeria sp?
Tamarix aphylla Ph
Tamarix ramosissima Ph
Tidestroemia lanuginosa
Tiquilia canescens Ph
Tithonia fruticosa
trap nests
Trixis sp?
Verbena plicata
Verbesina enceliodes exauriculata
Verbesina enceliodes exauriculata
Viguiera sp?
Xanthisma gracile
Xanthisma sp?
Xanthisma spinulosum
Zinnia acerosa Ph
Ziziphus obtusifolia